oh, this could be my thread - DH is a proper full scale carnivore, and i have been veggie since birth, so couldn't cook meat even if i wanted to
the secret with him is to make sure there is a) a meat substitute in evidence and b) LOTS of food for his portion
we eat mainly west indian food - Delicious Jamaica by Yvonne McCalla Sobers (you can get it on Amazon) has stacks of tasty and very easy recipes in it
typical meal in our house = curry, rice, coleslaw, plantain, some kind of meat thing (eg quorn fillets marinated in jerk seasoning) and if feeling fancy, i add plantain and potato salad
big plate of that will fill any belly
other things we eat lots of are rice fried with quorn chicken pieces, veg, chinese spice mix and lots of soya sauce
also veggie chilli, spag bol etc and veggie bangers and mash goes down a treat if you make the mash out of sweet potato and add garlic and thyme to it
i also make the jamie oliver meatballs 'n' more recipe (in the feed your family for a fiver thing he did recently) with frozen veggie meatballs
i couldn't offer anything made of just veg - DH would go out and get a takeaway afterwards, claiming he was still hungry...